William bated



(No Model.)

W. BAIRD.

SPINNING AND TWISTING MAGHINE.

N0. 341 ,631. P-atentedAMay 11, 1886. Pg

WITNESSES: INVHN'I'OR:

&hgm'w BY Jlmw ATTORNEYS.

UNITED STATES PATENT OFFICE.

"WILLIAM BAIRD, OF ALMONTE, ONTARIO, CANADA.

SPINNING AND TWlSTlNG MACHINE.

SPECIFICATION forming part of Letters Patent No. 34cl,63l,dated May11,1886.

Application filed May 27, 1885. Serial No. 166,863. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM BAIRD, of Almonte, Ramsay township, Provinceof Ontario, Canada, have invented certain new and useful Improvements inSpinning and Twisting Machines, of which the following is a full, clear,and exact description.

My invention relates to the spindle-driving mechanism ofspinning andtwisting machines, and has for its object to promote increasedproduction of yarn or thread with the highest attainable economy of thedriving-power, and

also to insure increased production, greater.

uniformity, and improved quality of the spun yarn or thread.

The invention will first be particularly described, and then pointed outin the claims.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicate Icorresponding parts in all the figures.

Figure 1 is a vertical sectional elevation of my improvement andadjacent parts of a spinning-machine. Fig. 2 is a detail plan viewof twoof the spindles which are in section, and the tension devices applied totheir respective driving-bands; and Fig. 3 is aperspective view of oneof the band-tension devices and its supporting-plate drawn to a largerscale.

The letter A indicates a grooved pulley or sheave, which is journaled inelastic wire arms B B, which preferably have two or more spiral twistsor bends at b to insure and preserve their elasticity, and are fixed bysoldering or by staples, or in any other approved way, to a metal orwood plate, 0, which is guided so as to he slid lengthwise on a rail, D,fixed to the frame of the spinning or twisting machine. I show the plate0 provided withatongue' or feather, c, which loosely fits agroove, d, inthe rail D; but any other well-known means of guiding the plate on therail may be employed. The plate 0 will be positioned on the rail D sothat the pulleys A will come in contact with the driving sides of thebands E, which pass around the whirls F of the spindles G from thedriving-cylinder H, the pressure or ten sion of the elastic arms Bholding the pulleys A to the bands, so as to take up the slackness ofthe bands, and insure a positive and quite regular rotative speed of thespind1es,so necessary for maximum production of finished thread or yarnof improved quality, and with a minimum expenditure of power in drivingthe spindles. may be made of metal in the usual way; but I prefer tomake them of elastic material, preferably soft rubber,to prevent thedriving-ban ds from slipping thereon. The spindle-driving bands may begiven one complete turn around the driving-cylinder H, as well as aroundthe whirl, but usually this will be unnecessary; in fact, the bands neednot be given a turn around the whirls or cylinder as the rubber whirls,combined with the tension device A B, will give excellent results whenthe bands run directly from the cylinder to the whirls.

When a tension device is not applied to the spindle-driving band, theband usually is put on too tightly at first, so asto avoid slip, and

The whirls F of the spindles.

the power used in driving the spindles is.

greater than need be, and the bands in a short time stretch toslackness, which results in a loss of power and in irregular rotativespeed of the spindles,with consequent unevenness or irregularity in thethread and lessened production, and when metal whirls are used thespindle-driving bands will slip on them more or less, whether the handsbe tight or slack, I

particularly when slack. It is evident that these disadvantages areobviated by my improvements, as the spindle, driving bands need not beput on too tightly at first, and any tendency to subsequent slacknesswill be corrected by the tension devices A B, which will hold the bandsproperly,or with just sufficient force of contact with the cylinder andelastic whirls.

I connect the plates 0, carrying the tension devices for the bands ofeach set of spindles, to a lever, I, which is pivoted at z'to themachine-frame, to the spindle step-rail J, for instance, and the leverswill project,so as to conveniently be operated for moving the plates Galong the rail D,as may be required for bringing the tension-pulleys Afairly in contact with the driving sides of the spindle-bands E, whenthe bands may be crossed for making reverse twist.

I show two lugs, 7r 7;, projecting from the plate 0 and connected by abar, K,with which the inner end of the lever I has a pin-and-slotconnection; but any other approved connection of the lever with theplate may be made.

The drawings, Fig. 1, represents the bandtension device and rubberwhirls applied to a ringspinning machine having a ring-rail, L, rings M,and travelers N, through which the thread 0 passes to the bobbins P,placed on the spindles G from guide-eyes B, through which the thread oryarn passes from the drawing rolls,(not shown;) but the band-tensiondevices may be applied to fly spinningmachines, or a variety of spinningand twisting machines employing spindles driven by bands.

I do not limit myself to the particular construction andarrangementabove described for the elastic supports to the tensionpulleyA, as these may vary as circumstances may require for securing therequisite degree of tension on the spindle-bands, according to thenature of the fibers being spun or the required fineness or coarsenessof the yarns, andthe devices for shifting the plates 0 to adjust thetension-pulfey A may be arranged in any approved way.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. The combination, with the spindles, whirls,driving-cylinder, and drivingbands of a spinning and twisting machine,ofa support below the bands, elastic wire arms secured to said support,andpulleys journaled in the free ends of the said arms, substantially asherein shown and described.

2. The combinatiomwith the spindles, their whirls, the driving-cylinder,and the spindledriving belt of a spinning and twisting machine, of asliding plate, spring-arms secured to said plate, pulleys journaled inthe free ends of said arms, and means for sliding said plate,substantially as herein shown and described. 7

3. The combination, with the spindle G, the rubber whirls F, thedriving-cylinder H, and the band E,of the plate 0, the spring-arms 13.secured to said plate and having twists b,and the pulleys A, journaledin the free ends of said arms, substantially as herein shown anddescribed.

4. The combination of elastically-supported tension-pulleys A, abase-plate, O, to which they are connected, a support for plate 0, and alever, I, jointed to plate 0, and adapted for operation to shift thetension-pulleys, substantially as herein set forth.

\VILLIA M BAIR D.

YVitnesses:

N. l STAFFORD, V I. L. SNEDDER.

